Drilling-machine.



Patented July 17, 191'?.

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C. A. HULTQUIST. lDRILLING MACHINE.

DRILLING-MACHIN E.

Specification of Letters Patent.

Patented July 17, 1917.

Application filed January 22, 1917. Serial No. 143,648.

To all whom it may concern:

Be it known thatl, CHARLES A. Huur-A especially in some respects to thattype of' drilling machine in which a stream of water is employed tominimize the production of dust and to flush the borings from the holebeing drilled.

An object of this invention is to prevent the pinching or cutting off ofthe air and water pipe..

Another object is to make provision for the utilization of exhaust airfrom the cylinder for normally accelerating the flow of water, carryingaway the borings, and for the utilization at times of live air foracceleration of the flow of the water for cleaning out the duct andgrooves of the drill steel when said grooves become plugged up with clayor other tenacious material.

Another object is to effect the foregoing by a comparatively simpleconstruction and one that is reliable in operation.

Further objects and advantages will appear in the subjoined detaildescription.

The accompanying drawings illustrate one embodiment of the invention:

Figure 1 is a side elevation of a stopin machine embodying theinvention.

Fig. 2 is an enlarged vertical mid section of the upper portion of themachine shown in Fig. 1.

Fig. 3 is an inverted plan view from line indicated by m34-w3, Fig. 2.

Fig. 4 is a plan section on line indicated by :eL-m4, Fig. 2.

Fig. 5 is an inverted plan section on line indicatedby @v5- m5, Fig. 2.I

Fig..6 is a plan section on line indicated by sa-m6, i'Fig. 2.

Fig. 7 is an inverted plan viewon line indicated by 7-7, Fig. 2.

Figs. 8, 9 and 10 are plan sections on lines indicated by wfg-ac,90g-m9, and x10-w10, re-

spectively.

Fig. 11 is a sectional plan view on the irregular line indicated by:vH-m, Fig. 2.

Fig. 12 is a sectional detail on line indicated by aan- 0012, Fig. 2.

Fig. 13 is a perspective view of the valve shown in Figs'. 2, 11 and 12.

In the drawings the inventionis embodied in a stoping machine, but it isunderstood that certain features of the invention hereinafter describedare applicable to drilling machines other than stoping machines. In Fig.1` the feed cylinder of a stoping machine is indicated at 1 and the feedpiston at 2 and next to the-feed cylinder is an air chest 3 which may beof any well known yco'nstruction and which contains a recprocative valve4 of any well known or desired construction. Dowel pins 5 may beemployed, if desired, to prevent relative rotation of the cylinder 1 andair chest 3.

Next to the air chest 3 is a water chest 6 and, if desired, dowel pins 7may be employed as shown to prevent relative rotation between the airchest and water chest.

Next to the water chest 6 is a cylinder 8 containing a plunger or hammer9 adapted to Work therein and the cylinder 8 also contains an anvil 10having a reduced head 11 adapted to be struck by the hammer 9 in amannery well understood in the art.

It is readily understood that it is preferable to extend the air andwater tube of a inachinelof this description a short distance -into theair and Water duct of the drill steel so as to minimize leakage of theair and water around the head of the drill steel when the drillingmachine is in operation and such construction is not new; but

' when the air and water tube is thus inserted in the drill steel, itfrequently occurs that after the machine has been in use for some timethe drill steel wears away the bore of .the chuck. in such manner thatthe drill steel is not always perfectly alined with the air and watertube but is disposed at an angle thereto. chuck the head of the drillsteel is sometimes so` eccentric to the axis of the anvil that thedischarge end of the air and water tube is pinched or broken 0H; and itis to After such wearing of the overcome these diiiiculties that some ofthe principal features of the invention are provided and these featureswill now be described.

The anvil 10 vis provided in its drill-steel engaging end with a guideway in the form of a recess 12 of any suitable shape. In the drawingsthe recess 12 is circular but it is understood that it may be hexagonalor any other shape. At the bottom of the recess' 12 is an annular groove13 around'a boss 14 which engages the head 15 of a drill steel 16,` saidhead being of appropriate shape to fit the recess 12`and to be guided bythe sides of the recess so as to maintain the head end of the drillsteel, that receives the blows from the anvil, concentric with saidanvil and its boss 14.

The cylinder 8 is provided internally with 7 end of said tube projectingbeyond the face of the boss 14 into the recess 12 and into the bore orduct 22 of the drill steel 16. In the 'drawings thedepth of the recess12 is the same as the distance thatthe tube 2l projects beyond the faceof the boss 14 in' consequence of which the outer end of the tube isHush with the outer face of the anvil 10. v

The cylinder 8 is provided with air inlet ports 23, 24 and with airvalvel ports '25, .b

26, said ports 23 to 26 inclusive extending through the water chest 6andinto the air chest 3 and communicating with the valve chamber 27 ofsaid air chest.

The valve chamber 27 is provided with an air intake or intakes 28 andwith exhaust ports 29, 30. One of the exhaust ports 29 is provided witha plug 31 and is connected by a duct-32 with a valve chamber 33 having arotary valve 34 adapted to be turned by a suitable handle 35, said valvechamber 33 bein formed in the water chest 6. The valve c amber 33communicates by a duct 36 with a nozzle chamber 37 which is providedwith a water nozzle 38 projecting into vthe intake end of the air andwater tube 21, the portion of said nozzle within said tube being of lessoutside diameter than the inside diameter oii the tube 21 so that airvadmitted through the duct 36 to the nozzle chamber -37 will dischargearound the nozzle 38 into the tube 21 to accelerate the flow of waterissuing from the nozzle 38.

The rear end of the nozzle 38 communicates with a water duct 39 whichreceives its supply of water through a water supply pipe 40 providedwith a valve 41.

The valve 34 is provided with a recess 42 forming a spring chambercontaining a coil spring 43,' one end of which pressesr against thebottom of the valve chamber' 33 and the other end against the valve 7034 so as to hold said valve tight against the inner face of a bushing 44that vis screw-threaded into the outer end of the valve chamber 33, theshaft 45 of the valve projecting through said bushing. The valve jrecess 42 is provided with a port 46 adapted to register with the duct32 when the valve 34 is turned into appropriate position for thatpurpose.v The valve recess 42 is also provided with a port 47 adapted toregister with a duct 48 when the valve 34 is turned to the appropriateposition, the ports 46, 47 being at different points circumferentiallyof the lvalve so that only one 'of said ports at a time may be turnedinto open positlon and so that both may be closed when desired.

The duct 48 communicates with one of the air intakes 28 so that whendesired live air or air under comparatively high pressure may beinducted intol the tube 21 to cause greater acceleration of the flow ofthe water in the tube than 4can be e'ected by exhaust air from thecylinder 8.

The nozzle 38 is provided with an annular 95 flange 49 which is seatedin the bottom of a recess 50 of the Water chest 6. Seated against thefiange 49 is a washer 51 which is brazed or otherwise firmly fixed tothe inner end of the tube 21 so as .to form an annular ange on saidtube. The ange 51 is tightly held against the flange 49 by a ushing 52Ascrew-threaded into the recess 50 and against the flange 51, the tube 21extending through said bushing.

Air is admitted to the valve chamber 27 through the air intake 28 whichextends into a throttle device 53 of any Well known or desiredconstruction, the; throttle handle being indicated at 54 and saidthrottle controlling the flow of air from the air supply hose 58 to themachine in a manner well understood in the art.

Ears or lugs 55, 56 on the cylinders 1 and 8 respectively and bolts 52'Vhold the cylinders, throttle device 53, and airV and water chests 3, 6in assembled position.

In practice, assuming that the hose 58 is connected with a suitablecompressed air supply, not shown, and that the water pipe 40 isconnected with a water supply, the operator, to drill, will operate thethrottle 11andle 54 to admit compressed air through the duct 28 into thevalve chamber 27. Assuming, for example, that the parts are in theposition shown in Fig. 2, the air thus admitted will force the valve 4from the position shown toward the opposite end of the valve chamber soas to admit air through the port 23 into the cylinder 8 to force thehammer-130 mesma 9 on its inor idle stroke. When the hammer movessuiiciently far to uncover the port 26, air will liow through said portinto the valve chamber 27 to force the'valve 4 into the position shownin Fig. 2 to admit air through the port 24 soas-to force the hammer 9 onits out or working stroke, and said hammer will strike the anvil 10 soas to deliver a blow to the drill steel 16 in 0rder to cut the materialengaged by the drill steel. Owing to the head 15 resting in and beingvguided by the recess 12, it is clear that the duct 22 of the drill steelwill always be axially alined with the tube 21 so that the end of thetube 21 projecting into the duct A 22 will not be injured by the drillsteel striking it, 'a's often occurs in. devices not provided with thisfeature of my invention.

The valve 4 and hammer 9 continue to reciprocate in the manner abovedescribed so as to deliver a succession of blows to the anvil 10.

To minimize the production of dust and to wash away the borings createdby the drilling steel in the cutting operation, under normal workingconditions, the operator will turn the handle 35 to bring the port 46into registration with the duct 32 so that exhaust air will flow fromthe valve chamber 27 through said duct and port into the recess 42,thence through the duct 36 and nozzle chamber 37 into the tube 21 toaccelerate the motion of the stream of water iowing through said tube soas to wash away the borings or cuttings from the hole being drilled.Thus, normally, only the exhaust air from the cylinder is used toaccelerate the flow of the water, but in some instances, especially whenthe drill steel is working in clayor other substances of like nature, itmay be advisable to impel the water into the hole with great force solas to force the clay or other substance out oi' the hole and out of thegrooves of the drill steel. To dothis the operator will turn the handle35 so as to move the port 47 into reg. istration with the duct 48 so asto admit live air through said duct and port into the valve recess 42,thence through the duct 36 to the nozzle chamber 37 and thence to thetube 21 i to accelerate the flow of water in said tubeand practicallyblow the clay or other substance out of the hole and grooves of thedrill steel so as to greatly facilitate the drilling operation.

I claim:

1. A drilling machine comprising a cylinder, a hammer reciprocating insaid cylin-4 der, an anvil to receive blows from the hammer, said anvilhaving a recess, a drill steel having its head in the recess, a tubeextending through the anvil and projecting into said recess, and a chuckin the cylinder for the drill steel.

2. A drilling machine comprising a cylmwill ' der, ananvil in thecylinder provided with a recess, a drill steel having itshead in therecess, there being a boss at the bottom of said recess, a hannner inthe cylinder to v strike the anvil, a tube extending through 4. Adrilling machine comprising a cylin-4 der, a hammer in the cylinder, awater chest.

having a recess, a nozzle having a flange in the recess, a tubeextending through the hammer and provided with a flange engaging theflange of the nozzle, said nozzle projecting into said tube, means tosupply water to the nozzle, and a bushing in the recess around the tubeto hold the flanges in place.

5. A drilling machine comprismg a cylinder, a hammer in the cylinder, awatei' chest having a recess, a nozzle having a flange in the recess, atube extending through the hammer and provided with a flange engag ingthe flange of the nozzle, said nozzle proj ecting into said tube, meansto supply water and said tube, and means to change the connections atwill to supply either exhaust fluid or full pressure fluid to the tube.

7 A drilling machine comprising a cylinder, a hammer in the cylinder, awater chest at one end of said cylinder having a nozzle chamber, a tubeextending through the hammer and fastened to the water chest, a nozzleprojecting into said tube, a duct to carry water to said nozzle, an airchest having a valve chamber, intake and exhaust ports extending fromthe air chest to the cylinder,

' a valve in said valve chamber to control the intake and exhaust ports,an air intake communicating with the valve chamber, a second valvechamber, a duct extendingI from the second valve chamber to the nozzlechamber, an exhaust port for the first valve chamber, a duct leadingfrom the last named exhaust port to the second valve chamber, a ductleading from the air intake to the second valve'chamber, and a valve insaid to the nozzle, a bushing in the recess around lll@ Fai 1.233,4??

second valve chamber to control the ducts extending through the anviland projecting leading thereto. beyond the drill-steel engaging face ofsai 8. In a drillin machine provided with a anvil.

hammer, an anvi having a recess to receive Signed at Los Angeles,California, thisy 5 the hed ofllche drillhsteel, alnd ai Waterr tube11th day of January, 1917.

exten 'ng t rough t e anvi an projecting into Said recess. g CHARLES A.HULTQUIST.

9. In a drilling machine provided with a Witnesses: hammer, an anvil'having means `to guide Gnonon I-I. Hime, 10 the head of a drill-steel,and a water` tube `A. F. SoHMmTBAUnR.

